Infiniti Q45 (FY33). Manual — part 207
DIAGNOSTIC PROCEDURE
INSPECTION START
1) Turn ignition switch “ON”.
2) Select “SELF-DIAG RESULTS”
mode with CONSULT-II.
3) Touch “ERASE”.
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
1) Turn ignition switch “ON”.
2) Select MODE 4 with GST.
3) Touch “ERASE”.
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
1) Turn ignition switch “ON”.
2) Erase the Diagnostic Test Mode
II (Self-diagnostic results)
memory.
PERFORM DIAGNOSTIC TROUBLE
CODE CONFIRMATION PROCEDURE.
See previous page.
Is the DTC P0605 (0301) displayed
again?
No
E
Yes
Replace ECM.
INSPECTION END
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0605
Engine Control Module (ECM) (Cont’d)
H
H
H
H
EC-357
Manifold Absolute Pressure (MAP)/Barometric
Pressure (BARO) Switch Solenoid Valve
SYSTEM DESCRIPTION
Camshaft position sensor
E
Engine speed
ECM
E
MAP/BARO
switch solenoid
valve
Ignition switch
E
Start signal
Throttle position sensor
E
Throttle position
Vehicle speed sensor
E
Vehicle speed
This system allows the absolute pressure sensor to
monitor either ambient barometric pressure or
intake manifold pressure. The MAP/BARO switch
solenoid valve switches between two passages by
ON-OFF pulse signals from the ECM. (One passage
is from the intake air duct, the other is from the
intake manifold.) Either ambient barometric pres-
sure or intake manifold pressure is applied to the
absolute pressure sensor.
Solenoid
Conditions
ON
I
For 5 seconds after turning ignition switch
“ON”
OR
I
For 5 seconds after starting engine
OR
I
More than 5 minutes after the solenoid valve
shuts OFF.
and
I
Throttle valve is shut or almost fully shut for
more than 5 seconds
and
I
Vehicle speed is less than 100 km/h (62
MPH).
SEF417Q
COMPONENT DESCRIPTION
The MAP/BARO switch solenoid valve switches its air flow pas-
sage according to the voltage signal sent from the ECM. When
voltage is supplied from the ECM, the MAP/BARO switch solenoid
turns “ON”. Then, the absolute pressure sensor can monitor the
ambient barometric pressure. When voltage is not supplied from
the ECM, the MAP/BARO switch solenoid valve turns “OFF”. Then,
the sensor monitors intake manifold pressure.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
MAP/BARO SW/V
I
For 5 seconds after turning ignition switch “ON”
I
For 5 seconds after starting engine
BARO
I
More than 5 seconds after starting engine
MAP
TROUBLE DIAGNOSIS FOR DTC P1105
EC-358
ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than ECM terminals such as the body ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage)
41
W
MAP/BARO switch sole-
noid valve
Ignition switch “ON”
For 5 seconds after turning ignition switch
“ON”
Engine is running
For 5 seconds after starting engine.
Approximately 0V
Ignition switch “ON”
More than 5 seconds after turning ignition
switch “ON”
Engine is running
More than 5 seconds after starting engine
BATTERY VOLTAGE
(11 - 14V)
ON BOARD DIAGNOSIS LOGIC
Diagnostic Trouble
Code No.
Malfunction is detected when .
Check Items
(Possible Cause)
P1105
1302
A) MAP/BARO switch solenoid valve receives the
voltage supplied though ECM does not supply
the voltage to the valve.
I
Harness or connectors
(MAP/BARO switch solenoid valve circuit is open
or shorted.)
I
MAP/BARO switch solenoid valve
B) There is little difference between MAP/BARO
switch solenoid valve input voltage at ambient
barometric pressure and voltage at intake mani-
fold pressure.
I
Harness or connectors
(MAP/BARO switch solenoid valve circuit is open
or shorted.)
I
Hoses
(Hoses are clogged, bent, kinked, disconnected,
not connected properly.)
I
Absolute pressure sensor
I
MAP/BARO switch solenoid valve
SEF261Y
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
Perform “Procedure for malfunction A” first. If the 1st trip DTC
cannot be confirmed, perform “Procedure for malfunction B”.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1105
Manifold Absolute Pressure (MAP)/Barometric
Pressure (BARO) Switch Solenoid Valve
(Cont’d)
EC-359
Procedure for malfunction A
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 11V at idle.
1) Turn ignition switch “ON” and select “DATA MONITOR”
mode with CONSULT-II.
2) Start engine and let it idle.
3) Wait at least 10 seconds.
4) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-364.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Follow the procedure “With CONSULT-II” above.
SEF273Y
Procedure for malfunction B
1) Start engine and warm it up to normal operating tem-
perature.
2) Turn ignition switch “OFF” and wait at least 5 seconds.
3) Turn ignition switch “ON” again and select “DATA MONI-
TOR” mode with CONSULT-II.
4) Make sure that “FUEL T/TMP SE” is more than 0°C
(32°F).
5) Start engine and let it idle for at least 10 seconds.
6) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-305.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine and warm it up to normal operating tem-
perature.
2) Turn ignition switch “OFF” and wait at least 5 seconds.
3) Turn ignition switch “ON”.
4) Check that voltage between ECM terminal
q
91
and
ground is less than 4.2V.
5) Start engine and let it idle for at least 10 seconds.
6) Select “MODE 7” with GST.
7) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-305.
SEF398W
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine and warm it up to normal operating tem-
perature.
2) Turn ignition switch “OFF” and wait at least 5 seconds.
3) Turn ignition switch “ON”.
4) Check that voltage between ECM terminal
q
91
and
ground is less than 4.2V.
5) Start engine and let it idle for at least 10 seconds.
6) Turn ignition switch “OFF”, wait at least 5 seconds and
then turn “ON”.
7) Perform “Diagnostic Test Mode II (Self-diagnostic
results)” with ECM.
TROUBLE DIAGNOSIS FOR DTC P1105
Manifold Absolute Pressure (MAP)/Barometric
Pressure (BARO) Switch Solenoid Valve
(Cont’d)
EC-360
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст